<head>
  <meta charset="utf-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
  <meta name="viewport"
    content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no, minimal-ui">
  <meta name="renderer" content="webkit">
  <meta http-equiv="Cache-Control" content="no-transform" />
  <meta http-equiv="Cache-Control" content="no-siteapp" />
  <meta name="apple-mobile-web-app-capable" content="yes">
  <meta name="apple-mobile-web-app-status-bar-style" content="black">
  <meta name="format-detection" content="telephone=no,email=no,adress=no">
  <!-- Color theme for statusbar -->
  <meta name="theme-color" content="#000000" />
  <!-- 强制页面在当前窗口以独立页面显示,防止别人在框架里调用页面 -->
  <meta http-equiv="window-target" content="_top" />
  <!-- baidu & google verification  -->
  {{ with .Site.Params.baiduVerification }}
  <meta name="baidu-site-verification" content="{{.}}" />{{ end }}
  {{ with .Site.Params.googleVerification }}
  <meta name="google-site-verification" content="{{.}}" />{{ end }}
  {{- if .Keywords -}}
  {{ $length := len .Keywords | add -1 -}}
  <meta name="keywords"
    content="{{ range $index, $element := .Keywords }}{{ $element | safeHTML }}{{if ne $index $length }}, {{ end }}{{ end }}" />
  {{- else if .Site.Params.keywords -}}
  {{ $length := len .Site.Params.keywords | add -1 -}}
  <meta name="keywords"
    content="{{ range $index, $element := .Site.Params.keywords }}{{ $element | safeHTML }}{{if ne $index $length }}, {{ end }}{{ end }}" />
  {{- end }}

  {{- if .Description -}}
  <meta name="description" content="{{ .Description | safeHTML }}" />
  {{- else if .IsPage -}}
  <meta name="description" content="{{ .Summary | plainify }}" />
  {{- else if .Site.Params.description -}}
  <meta name="description" content="{{ .Site.Params.description | safeHTML }}" />
  {{- end -}}



  <!-- Site Generator -->
  <meta name="generator" content="Hugo {{ .Site.Hugo.Version }} with theme pure" />
  <title>
    {{- block "title" . -}}
    {{ if .IsPage }}{{ .Title }} - {{ .Site.Title }}{{ else }}{{ .Site.Title }}{{ end }}
    {{- end -}}
  </title>
  <!-- Canonical links -->
  {{ range .AlternativeOutputFormats -}}
  {{ printf `<link rel="%s" type="%s" href="%s" title="%s" />` .Rel .MediaType.Type .Permalink $.Site.Title | safeHTML }}
  {{ end -}}
  {{ $css := resources.Get "css/style.css" | minify | fingerprint}}
  <link rel="stylesheet" href="{{ $css.Permalink }}">
  {{ with .Site.Params.customCSS }}
  <link rel="stylesheet" href="{{ . | absURL }}" async>{{ end }}
  <link rel="stylesheet" href="https://cdn.staticfile.org/highlight.js/9.15.10/styles/github.min.css" async>
  {{- if eq .Site.Params.comment.type "gitalk"}} 
  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/gitalk@1/dist/gitalk.css" async>    
  {{- end }}
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/tocbot/4.4.2/tocbot.css" async>
  {{/* NOTE: These Hugo Internal Templates can be found starting at https://github.com/spf13/hugo/blob/master/tpl/tplimpl/template_embedded.go#L158 */}}
  {{- template "_internal/opengraph.html" . -}}
  {{- template "_internal/google_news.html" . -}}
  {{- template "_internal/schema.html" . -}}
  {{- template "_internal/twitter_cards.html" . -}}

  <!-- Polyfill for old browsers -->
  {{ `<!--[if lte IE 9]>
      <script src="https://cdnjs.cloudflare.com/ajax/libs/classlist/1.1.20170427/classList.min.js"></script>
    <![endif]-->` | safeHTML }}

  {{ `<!--[if lt IE 9]>
      <script src="https://cdn.jsdelivr.net/npm/html5shiv@3.7.3/dist/html5shiv.min.js"></script>
      <script src="https://cdn.jsdelivr.net/npm/respond.js@1.4.2/dest/respond.min.js"></script>
    <![endif]-->` | safeHTML }}

</head>